Remote code execution via undisclosed authorization flaw
Published Jul 3, 2026 · Updated Jul 3, 2026
Improper authorization in Microsoft Edge before 150.0.4078.48 allows remote attackers to execute code through network-delivered content. Microsoft has not disclosed the affected component or the incorrect authorization operation performed on untrusted input. Exploitation requires user interaction and can execute attacker-controlled code beyond the browser's authorization boundary.
Summary
What happened
Improper authorization in Microsoft Edge before 150.0.4078.48 allows remote attackers to execute code through network-delivered content. Microsoft has not disclosed the affected component or the incorrect authorization operation performed on untrusted input. Exploitation requires user interaction and can execute attacker-controlled code beyond the browser's authorization boundary.
The record
- CVE
- CVE-2026-58284
- Published
- Jul 3, 2026
- Updated
- Jul 3, 2026
- Vendor
- Microsoft
- Product
- Microsoft Edge (Chromium-based)
- Classifications
- CWE-285, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 3, 2026CVE publishedPublication date reported by the CVE source.
- Jul 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.0.0.0 <150.0.4078.48
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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